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Summing digits

Given n, find the sum of the digits that make up 2^n. Example: Input n = 7 Output b = 11 since 2^7 = 128, and 1 + ...

ongeveer 4 jaar ago

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Bullseye Matrix

Given n (always odd), return output a that has concentric rings of the numbers 1 through (n+1)/2 around the center point. Exampl...

ongeveer 4 jaar ago

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Return the largest number that is adjacent to a zero

This example comes from Steve Eddins' blog: <http://blogs.mathworks.com/steve/2009/05/27/learning-lessons-from-a-one-liner/ Lear...

ongeveer 4 jaar ago

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Find the longest sequence of 1's in a binary sequence.

Given a string such as s = '011110010000000100010111' find the length of the longest string of consecutive 1's. In this examp...

ongeveer 4 jaar ago

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Find the numeric mean of the prime numbers in a matrix.

There will always be at least one prime in the matrix. Example: Input in = [ 8 3 5 9 ] Output out is 4...

ongeveer 4 jaar ago

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Remove all the consonants

Remove all the consonants in the given phrase. Example: Input s1 = 'Jack and Jill went up the hill'; Output s2 is 'a ...

ongeveer 4 jaar ago

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Fibonacci sequence

Calculate the nth Fibonacci number. Given n, return f where f = fib(n) and f(1) = 1, f(2) = 1, f(3) = 2, ... Examples: Inpu...

ongeveer 4 jaar ago

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Back and Forth Rows

Given a number n, create an n-by-n matrix in which the integers from 1 to n^2 wind back and forth along the rows as shown in the...

ongeveer 4 jaar ago

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Determine whether a vector is monotonically increasing

Return true if the elements of the input vector increase monotonically (i.e. each element is larger than the previous). Return f...

ongeveer 4 jaar ago

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Who Has the Most Change?

You have a matrix for which each row is a person and the columns represent the number of quarters, nickels, dimes, and pennies t...

ongeveer 4 jaar ago

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Make a checkerboard matrix

Given an integer n, make an n-by-n matrix made up of alternating ones and zeros as shown below. The a(1,1) should be 1. Examp...

ongeveer 4 jaar ago

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Swap the first and last columns

Flip the outermost columns of matrix A, so that the first column becomes the last and the last column becomes the first. All oth...

ongeveer 4 jaar ago

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Find all elements less than 0 or greater than 10 and replace them with NaN

Given an input vector x, find all elements of x less than 0 or greater than 10 and replace them with NaN. Example: Input ...

ongeveer 4 jaar ago

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Triangle Numbers

Triangle numbers are the sums of successive integers. So 6 is a triangle number because 6 = 1 + 2 + 3 which can be displa...

ongeveer 4 jaar ago

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Column Removal

Remove the nth column from input matrix A and return the resulting matrix in output B. So if A = [1 2 3; 4 5 6]; and ...

ongeveer 4 jaar ago

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Select every other element of a vector

Write a function which returns every other element of the vector passed in. That is, it returns the all odd-numbered elements, s...

ongeveer 4 jaar ago

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Determine if input is odd

Given the input n, return true if n is odd or false if n is even.

ongeveer 4 jaar ago

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Find the sum of all the numbers of the input vector

Find the sum of all the numbers of the input vector x. Examples: Input x = [1 2 3 5] Output y is 11 Input x ...

ongeveer 4 jaar ago

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Make the vector [1 2 3 4 5 6 7 8 9 10]

In MATLAB, you create a vector by enclosing the elements in square brackets like so: x = [1 2 3 4] Commas are optional, s...

ongeveer 4 jaar ago

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Times 2 - START HERE

Try out this test problem first. Given the variable x as your input, multiply it by two and put the result in y. Examples:...

ongeveer 4 jaar ago

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Can any body tell me how to implement KSVD in matlab?

Here is a function which implements the K-SVD algorithm. function [ mD ] = DL_KSVD( mD, mX, paramCardinality ) numberO...

Can any body tell me how to implement KSVD in matlab?

Here is a function which implements the K-SVD algorithm. function [ mD ] = DL_KSVD( mD, mX, paramCardinality ) numberO...

bijna 5 jaar ago | 0

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Linear Least Squares With 2 Inequality Constraints

I created a solution. It can be found here: http://math.stackexchange.com/a/1403593/33

Linear Least Squares With 2 Inequality Constraints

I created a solution. It can be found here: http://math.stackexchange.com/a/1403593/33

meer dan 5 jaar ago | 0

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Question

Linear Least Squares With 2 Inequality Constraints

Hello, I would like to know how can I solve the following Linear Least Squares problem: arg min(x) (Ax - b)'(Ax - b) s....

meer dan 5 jaar ago | 2 answers | 0

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Fast Anisotropic Curvature Preserving Smoothing

Fast Anisotropic Curvature Preserving Smoothing for High Quality Image Denoising

meer dan 5 jaar ago | 1 download |

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Computing Mahalanobis Distance Between Set of Points and Set of Reference Points

Here is the solution fully vectorized (Though uses much more multiplications than needed): mA = reshape(bsxfun(@minus, perm...

Computing Mahalanobis Distance Between Set of Points and Set of Reference Points

Here is the solution fully vectorized (Though uses much more multiplications than needed): mA = reshape(bsxfun(@minus, perm...

meer dan 5 jaar ago | 0

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Question

Computing Mahalanobis Distance Between Set of Points and Set of Reference Points

Hello, I have an n x p matrix - mX which is composed of n points in R^p. I have another m x p matrix - mY which is compo...

meer dan 5 jaar ago | 2 answers | 0

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Backslash for solving very big sparse matrix in Ax=b

If you're memory limited the best solution I know of is <https://en.wikipedia.org/wiki/Conjugate_gradient_method Conjugate Gradi...

Backslash for solving very big sparse matrix in Ax=b

If you're memory limited the best solution I know of is <https://en.wikipedia.org/wiki/Conjugate_gradient_method Conjugate Gradi...

meer dan 5 jaar ago | 0

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Weighted k means clustering

Usually the weighting would be using <https://en.wikipedia.org/wiki/Mahalanobis_distance Mahalanobis Distance> Matrix. If I'm...

Weighted k means clustering

Usually the weighting would be using <https://en.wikipedia.org/wiki/Mahalanobis_distance Mahalanobis Distance> Matrix. If I'm...

meer dan 5 jaar ago | 0

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Reshape Video Matrix Into Long RGB Matrix and Back

I think I have a solution (At least one). going from video into one lone image: function [ mOutputImage ] = ReshapeVideo...

Reshape Video Matrix Into Long RGB Matrix and Back

I think I have a solution (At least one). going from video into one lone image: function [ mOutputImage ] = ReshapeVideo...

meer dan 5 jaar ago | 0

| accepted